Automatic circuit-closing device for elevators.



0, w; SAUER, JR. AUTOMATIC CIRCUIT CLOSING DEVICE FOR ELEVATORS.

APPLICATION FILED SEPT. 16, 1912.

1,090,794. Patented Mar.17,1914.

' I h g WM, 7

UNITED STATES PATENT carton.

CHARLES w. SAUER, as,

OF ELIZABETH, NEW JERSEY.

I AUTOMATIC CIRCUIT-CLOSING DEVICE FOR ELEVATORS. a

' Specification of Letters ratent.

To all whom it may. concern Be it known that I, CHARLES W. Sauna, Jr., acitizen of the United States, residlng at Elizabeth, in the county ofUnion and State of New Jersey, have invented new and useful Improvementsin Automatic Circuit- Closing Devices for Elevators, of which thefollowing is a specification,

My invent-ion relatesto an automatic C11- cuit closing device for use inconnection with elevators.

An object of my invention is to provide a circuit closing device whichis carried-by the framework of an elevator door, which device normallykeeps the electrical circuit open, however, as soon as the elevator dooris closed, the circuit will again be closed.

The advantages and novel features of my invention will be manifest..Many serious accidents have occurred in large buildings and departmentstores because of the fact that elevator conductors almost invariablystart the machines before the door is closed. In most cases, the machineis started and the door given a push, and sometimes the elevator is atthe next floor before the door below is closed. It is my object toprovide this circuit closing device which will prevent the operator fromstarting the machine until after the door is closed, the circuit beingbroken and therefore the mechanism of the machine cannot be energized.

With the above and other objects in View, my invention relates to suchdetails of construction and in the arrangement and combination of partsas will hereinafter be fully described and specifically pointed out inthe appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which theFigure is a side elevation of my invention showing the sideyplatethereof removed,fFig. 2 a diagrammatical view of the electrical circuitin whichswitches are connected.

In the accompanying drawings wherein is illustrated the preferred formof Inyinvcntion, an elevator door, and frame. are shown. W hile thisform of door and frame has been illustrated in the drawings, it is to beappreciated that this form is merel shown for sake of illustration andthat other devices can be' employed if occasion should require.

The numeral 10 designates the casing of the device which is sunk intothe frame of the building and which is insulated therefrom as shown at11. The casing has the ordinary lips 12 provided therein which haveopenings 13 provided therethrough for the reception of the screwscarried by the side pieces 14.; A shaft 15 is journaled through the sidepieces 14: and has pivoted thereon a substantially bell crank arm 16,

the latter having a coil spring 17 connected therewith and with a lug18. A stop 19, limits movement of the bell crank 16, as shown by the topline'position of the latter in Fig. 1.

The forward extremity of the arm 16 has an enlargement 2Oprovided'thereon which has a depression thereinfor the reception of thecontact point 21 carried upon the plate 22, the latter being supportedupon a block 23 as is shown. An electrical conductor 24 has connectionwith the plate 22 and extends through the upper portion of the casing asshown, it being insulated from the latter of the sleeve 25. It is nowapparent that when the enlargement of the arm 16 is in engagement withthe contact point 21 a circuit will be closed through the shaft 15 andconductor 26, thelatte'r ex tending from the lower portion of the casingand being insulated therefrom by the sleeve 27. The conductor's abovereferred to have connection with the tnain line of the elevator and ifcommunication between these two is established, the mechanismcontrolling the elevator may be operated, however, if the circuit isbroken, the operator cannot under any circumstances start the machine.

By the provision of the spring 17, it is apparent that the arm 16 isnormally held out of engagement-with the contact points 21 and againstthe stop 19. I

For purpose of throwing thearm into engagement with the contact point,the door is provided with a projection 28 which is secured thereto bythe pins 29 and insulated therefrom by the strip of insulating material30.

A finger 31 is pivoted within the casing as shown at- 32 and hasconnection at its lower extremity with a link 33,'the latter also beingpivoted to the lower extremity of the arm 16$ In theopcration of myinvention when the door A is open, the mechanism within the casingwillat-tain the position indicated Patented Mar. 1'7, 1914. Applicationfiled September 16, 1912. Serial No. 720,654.

in dotted lines in Fig. 1,however, when the door is closed theprojection .28 carried thereon will engage the finger yfi'l, whereby thearm 16 will -'be rocked s'o as 'to close the circuit between thecontacts 24 and 26 as above set forth. a r

' By-this arrangement it is thought that thefdiificulties which haveheretofore existed inconnection with elevators are obviated,

1 I-fdesire to be vunderstood that I may make sl ight-changesin theconstruction and in the arrangement and combination of parts, provided,-however, such changes fall within thescope of the subjoined claims.

.Havmg thus fully describedmy inventioii, what I claim asnew, and desireto se- ,point-, a fingerpivoted within said casing, a

link connecting said finger and said arm and means carried by said doorframe and engaging said link' torthrowing-said arm into; engagement withsaid contact point as and] for the purpose set forth anddescribed,

1 2'. In combination with a door and door frame, of a casing carried by'said door frame, said casing having'electrical conductors introduced.therein, a block supported within said casing, a plate'upon said block,a contactpoint carried upon said plate, one of said conductorsconnecting with said plate, a'sha-ft jo'urn'aled in said casing, an armon said shaft, said arm having an enlargementon one end forengagecontact point, a lag pos1-- ment with: said. tion'ed within saidcasing, a C011 spring connecting said lug and said arm,. normallyholding said armout otengagement with said contact point, a fingerpivoted within said casing, a link. connectingsaid finger to said arm,the other of said conductors having connection with said shaft, and aprojectio-n carried by said door for engaging saidvfinger and throwingsaid arm into engagement with said cont-act point-as and for the purposeset forth and described.

CHARLES W. 'SAUER, JR. .Witnesses;

FRANK D. WALSH, W. A; BOURBON.-

gopiel. of thispatent may be obtained ,(or five cents each, joyaddressing the Commissioner-'0! Patents,

. Washington, D. '0.

